Driving and transmitting mechanism for wheeled vehicles.



w. '1 MARKS.

' DRIVING AND TRANSMITTING MECHANISM FOR IWHBBLED VEHICLES. APPLZIQATION FILED MAY 26, 1905. Q 91 8, 685 V W. :n. MARKS.

TING MECHANISM FOR WHEELED VB APPLICATION FILED MAY 26, 1905.

DRIVING AND TRANSMIT HIGLES.

Patented Apr. 20, 1909.

6 SHEETS-SHEBT 2 lr w/ I W. D. MARKS. DRIVING AND TRANSMITTING MECHANISM FOR WHBELED VEHICLES.

APPLIOATION FILED MAY 26, 1905. 1

Patented Apr. 20, 1909 6 SHEETS-SHEET 8.

W. D. MARKS. DRIVING AND TRANSMITTING MEGHANISM FOR WHEELED VEHICLES.

APPLICATION FILED MAY 26, 1905.

HEBT 4.

Patented Apr. 20, 1909.

6 SHELTS-S W. D. MARKS. DRIVING AND TRANSMITTING MECHANISM FOR WHEELED VEHICLES.

' APPLIOATIOH FILED MAY 26, 1905. 91 8,685.

Patented Apr. 20, 1909.

6 SHEETS-SHEET 5.

V w. n. MARKS.

DRIVING AND TRANSMITTING MECHANISM FOR WHBELED VEHICLE-S.

APPLIOATIbR FILED MAY 26, 1905.

- Patented Apr. 20, 1909.

6 SHEETS-SHEET 6.

I pnlrrn' WILLIAM D. MARKS, OF WESTPQRT, NEW YORK.

DRIVING AND TRANSMITTING MECHANISM FOR WHEELED VEHICLES.

Specification of Letters Patent.

Patented April 20, 1909.

Application filed May 26, 1905.' Serial No. 262,605..

7 all whom it may concern.

.Be it known that LWVILLIAM D. MARKs, a citizen of the United States, and a resident of l/Vestport, .l lssex county, New York, have in-.

vented certain improvements in Driving and, 'lransmitting Mechanism for W heeled Vehicles, of which the following is a specification.

Mp -invention relates to mechanism for transmitting power to drive wheeled vehicles, and consists of certain improvements in transmitting, reversing and speed changing mechanism applied to an improved type of self-pro 'ielli-id car or locomotive in which an internal combustion engine may be employed as the source of power.

In the particular embodiment of my invention I make use of a pair of engines between which .is located the power transmitting shaft, the reversing gear and the mechanism for changing or reducing the velocity of the speed transmitted. The power transmitting or driving shaft is connected by means of extension couplings and universal joints to line-' shafts carrying wheels or disks having heavy pins, and these, in turn; mesh with and serve to drive similar wheels or disks carried by the' car axles, the whole forming a flexible and massive linkage.

My invention further consists of a special form of clutch for locking the driving and reverse gear to the motor shaft; a special form of speed changing gear with which a similar fornr'of clutch is employed, and other details of construction which will be more fully pointed out hereinafter.

A further feature of my invention consists in mounting the motors, the speed'transmitting and speed changing mechanism and the reversing gear in a cradle supported by the truck bolsters of the car and disposed substantially in the center of the latter, entirely independent of theacar body, the power being transmitted to said axles by the pin gears through the medium of extension couplings, universal joints and swiveling hangers as noted above; making a flexible transmis sion adapting itself to the swiveling of the car trucks and the movements of the car axles.

,My invention is fully shown in the accompanying drawings, in which:

ing th mechanism disgu sedentirely heneath the car; Fig. 2, is a diagrammatic plan view of the trucks, the motor supporting structure and the driving mechanism, the car being shown in dotted lines; Fig. 3, is a plan view of the speed transmitting and reversing mechanism; Fig. ,4, is asectional view of the speed changing mechanism, taken on the line a n, Fig. 3; Fig. 5, is an enlarged sectional view of the reversing mechanism, taken on the line 11-12, Fig. 3; Fig.- 6, is a sec-. tional elevation of the pin gearing for transmitting movement from the linkage shafts to the car axles, showing also the swiveling hanger; Fig. 7 is a plan view of a portion of this pin gearing; Fig. 8, is a reverse plan view of a part of Fig. 6 Figs.,f3 and 10, are sectional views illustrating the universal ployed in connection with the transmitting ,niechanism forming the subject of my invention; Figs. 13, 14-, '15, 16, 17 and 18, are views illustrating details of the clutch forming the subject of my invention; Figs. 19 and 20, are views of the speed changing gear, and Fig. 21, is a'sectional perspective view of one of the pins.

One of'the most important features of my invention is the driving of all four axles of the'car with an equal velocity ratio; the en tire weight of the car riding upon such axles being employed for adhesion and tractivc cil'ort.

The cradle 1, carried beneath the center of the car 2 and formed of suitable I-bcams or other metal shapes, supports the motors or other drivingmeans and the speed changing and reversing mechanism. The ends Ii of this cradle are connected to a false body bolster of the car, and the support for the driving mechanism can thereby be .made wholly indc cndent of the car body.

A central ongitudinal shaft 4, forming the 'power transmitting shaft, is connected, by

means of universal joints 5 and extension couplings 6, with line-shafts 7 and 8, dir posed beneath the trucks 9, each of which shafts carry two pin gear disks 10, which in turn mesh with pin gear disks 11 carried by the axles 12 of said trucks. This pin gearing forms a very important part of my invention I and of the forming the subject ,of the'samc. Each of power transmitting mechanism the shafts 7 and 8 are mounted in swiveling journals or bearings supported by the axles 2 of the trucks, and such journals or bearings are so arranged as torpermit rocking mcvement of these joints. 1e pin gearing forming the subject of my invention is a decided departure from the ordinary type of gearing employed for transmitting motion in driving vehicles of heavy type. The disks 10 forming part of this gearing are quite large, being about eighteen inches in diameter, and each carrying pins 16, in the present instance six in number set c iii-distantly. and as near as racticable to t e margin o rim of such dis s. These pins in turn mesh with similar pins carried by the disks 11 of the truck axles. The pins which I employ are composite in their structure, being made up of a core or stem 19, drivenby hydraulic pressure into aperturhs formed in the disk; such core being centrally bored at 21 from end to end. The apertures in the disks to receive the cores are enlarged at 22 just below the surface of the disk, and carried by the cores are the sleeves 23, which extend into these enlarged portions of the sockets, and, while being free to turn therein, pros' an oil-tight cover for such core, so that the inner surface of the same may be lubricated by an internal oil supply. The inner end of these sleeves is provided with legs 24 to receive the head 25 of a bolt 26, which bolt extends through the central bore of the core andis fastenedby means of a nut or 'cotter pin 27. A leather washer 28 is interposed between the sleeve and the bottom ofthe recess receiving the same. These bins and their rotatable sleeves which may we made of any desirable material, are quite massive, being nearly four inches in diameter, which is equal, in the present instance, to the distance'between the centers of the shafts carrying the same, and for the greatest efiiciency they should bear this rela tion to the shafts. Being of such size, they are practically indestructible and will be unaffected by dirt, grit, wood or stones raised from the roadbed of the track; in most cases throwing such material aside or grinding it between their engaging surfaces, at the same time the sleeves are free to turn and the wear of the same is quite inappreciable.

The linkage shafts 7 and 8 are supported by saddles 30 carried by the axles 12, such sa-ldles having sleeves 3'1 surrounding said linkage shafts, and forming the bearings 15. Tile saddles are supported by side lugs 32 of collars 33 carried by the car axles. These collars are loose on the axles, and being in engagement with the linkage shafts compensate for the movements of the latter due to undulations or irregularities in the roadbed:

erases 4, which carries a loose disk having pins 36 ol the same general (,liaracter as those carried by the disks" 10 and U, which disk is driven from the bottom by means of the disks 37 and 38 carried by the driving shaft 39. Only one of these disks forms a transmitting GlGXIlGHt at one time, the other rotating idly 011 the shaft. To throw either of the disks 37 or 38 into engagement with the shaft 4, I provide a special form of clutch for each disk, and means for throwing said clutches. This comprises a sleeve 40 splined to said shaft 39 and carrying clutch cnga gin g members 41 at eaclrend, such sleeve being actuated by suitable means to cause it to move either clutch. into engagement with one of said disks. With especial reference to Fig, 5, showing a sectional elevation of the reversing mezlnmism, and Figs. 13 to 18, inclusive, illustrating the details of the so me, I will explain the construction and operation of the clutches employed in connection with this part of my invention. These clutches are' of a new type which I. have termed 'b'andage friction clutches, and as they are duplicated a description of one will be sullicient. independent eccentrically or concentrically mounted arms 42 are carried by the disks 37 and 38, which, when turned on their bearings 43 by the engagement oi the moving sleeve 40, grip the engaging portion 44 of the latter. (loinbincd with such eccentric members is a band spring 45 coiled a number of times and passed through openings in the bearings 4-3 of said members. By this means a very strong grip ring ell'ect distributed equally on each member can be secured upon the sleeve, which is splincd to and turns with the shaft 8i), and absolute rigidity of the parts connected secured. These clutches are employed in connectioi'i with the disks 37 and 38, each of which is provided with pins forming the driving means, and serve to transmit the movement of the motors to the driving shaft 39. Nornuilly, these disks are free to rotate on said shaft 39, but as a matter of fact, one of them is generally clutched to such shalt. Formed on the inner sides of the disks are a series ol ribs 4.6 having recesses 47 to receive the coiled band spring 45 having a number of laps or layers; in the present instance sixteen in all. This springbandage, as I have termed it, is confined by a series of collars 48 adapted to the recesses 47 in said ribs and held in place by cover plates 49 fastened at one end by a'screw 50, and confined at the opposite end by the sleeves of the pins connected to the disks, There are usually six of the ribs 16, and the spring; or. bandage is supported at equi-distant points. Under normal conditions thedisks are free to rotate on tlie'shaft 39 as may be readily noted. For the purpose of clutching them to said shait, however, the following means are provided, it being understooiil that but one clutch is operated at a time, andthat both clutches are constructed exactly alike. Disposed alternately with respect to the ribs are. a series of eccentric or concentric members 43, each having an opening 51, which may be off-set as noted in 16, or centrally disposed as shown in Fig. 18, which serves to receive the coils of the band spring.

Surrounding these eccentrics are straps .52

having arms 42 with concaved engaging faces or brake shoes 53 whose curvature is on the arc of a circle struck from the center of pins 57 and 58 on the straps 52, suc springs serying to turn the strap and. throw the engaging lace outward when the expanding member carried by the sleeve has been retracted, while the opposite end of such spring prevents such movement of the band as would displace its engaging portion. The spring bandage as I have termed it, equalizes the pressure upon each brake shoe. T he clutch on the other disk is identically the same Carried by the shaft 39 is the sleeve 40, plined to said shaft, and to which means are attached for shifting it from one clutch to the other so as to take power from both engines.

This. sleeve carries at each end the. cupshaped clutch engaging members 41 recessed at 59 to fit over the hubs 60 of the disks, and having external flanges 61 to engage the arms 42 of the straps encircling the i'nenibers 43-. As such sleeve islongitudinaliy moved on the shaft 39, the engagement of these parts shifts the straps 52 on their eccentric or concentric i'nenlbers 43 and tends to expand the coiled spring, ch angin its form from that approximating a true circle as shown in 1g. 1.3, to a hexagonal contour as shown in lg. 14, the projecting arms gripping the surface l t-nfthe cup-shaped ends 41 of the sleeve.

"Theend pressure of such projections due to the change of form of the coded spring is enor,mous,.sud the contact being close to the center of rotation. there isno possible chancefor s ipping, and a positive clutch of enormouspower is obtained. i

The sleeve 40 is splinedto the .shaft 39 by .nieans'of. four feathers 62 as clearly shown in 1g, 5, and, thiaconnection will insure surficlentengagement between these parts. To

insure, the. ready movement of the sleeve on;

spacebetween these members and each of the several bearings; the latter being providi wl with packing65 of dope to which oil is passed tlnnughcentrally bored holes 66 in the shaft: 39 coinn'umicating with the holes 63 and 64. It will be noted that I 'n'ovide special means ofsecuring a plentiful supply of oil to the journalsof the disksand other bearings of the main driving shaft.

The motors are connected to the llange couplings 67 at the ends of the shaft 59. When-the shifter sleeve 40 is in the position shown in the. drawings, the motors are drivingtthe car forward, and to reverse the direction of movement of the car it isonly necessary to shift the sleeve on the shaft 39, when the present driving disk will be disengaged and the clutch of the other one will be thrown in, and the car will be driven backward. This movement of the sleeve. 10 is accomplished-by means of aworm 70 carried by a rod 71, which is operated by hand wheels 7 2 shifted on said shaft 39 and cause either of i the disks 37 or 38 to be thrown into positive engagement with saidshaft.

The shaft 4 forms a part of the linkage train, and in addition to the loosedisk 35, it carries, means for throwing into gear the s eed changing mechanism; A pair of c utches or brakes are employed in connection withthis'mechanisin whlch are of similar type to those just described, and the clutching members act against the beveled faces 78 and 79 of a suitable drum. 80, which is loosely mounted on a sleeve 88 carriedbythe shalt 4. This drum has a series of arms 82 set at equi-distant points, 'WlllClI carry' nuts 83 engaged by threaded portions 84 of'a, series of rods 85, said rods having pinions 86 which are turned in unison by a gear Wheel 87 mounted on the shaft 4,.and thrown into engagement to shift the drum uniformly when it is desired to change the speed; i

The. shaft 4 carries a pair of cannons 88 and 89, each of which is keyed to a disk 90 and 91, carrying clutches 92 and 93. To the shaft 4 'a sun pinion. 9.4 of an epieyc-lic. train is/ keyed or otherwise secured, the planet pinions of which, three in number and indicated ,at 05, are carried by shafts or spindles 96 journalcd in said disk 35. Each of these pinions 94 and 95am provided with the same number of teeth, in the present instance twenty-two. iilacl'i of the cannons 88 and S9, carry sun pinions )7 and 98, the

pinion 9 7 having twenty-five teeth, while the p1n1on 98 has twenty-three teeth.

spindles 95 and havingnineteen teetheach. These pinions form part of an e icyclic train for reducing the speed of the isks 37 and 38 and transmitting about one-fourth of the same to the shaft 4-. Meshing with the pinion 98 are three planet pinions 100, also carried by the shafts or s indles96 and having twenty-one teeth. These pinions form part of an epicyclic train for reducing the speed of the disks 37 and 38 and transmitting one-eleventh of the same to the shaft 4. All intermediate speeds are obtainable by advancing the time of the spark to effect explosion and drive the engine at varying speeds. v1 hen the disk of the cannon 88 is clutched to said drum, the speed transmitted will be about one-fourth of that generated by the engines; when, however, the drum is shifted so as to be clutched with the disk on the cannon 89, the speed transmitted will be about one-eleventh of that generated by the engines.

It will be noticed that the form of clutch employed in connection with the speed change is substantially the same as that employed in connection with the means for reversing the direction of rotation of the power transmitting shaft. The difference, however, lies in the fact that whereasin the reversing mechanism the pressure members turn on eccentric or concentric hubs, in the speed change such pres- .sure members 12 are moved outwardly by the beveled faces of the sliding drum. In both instances, however, the coiled spring bandages cm loyed.

It will be noticed that the pins carried by the disks on the linkage shafts 7 and 8, the

truck axles 12, and the loose disk 35, are

provided with beveled ends, while the pins on the disks 37 and 38 are not beveled. In gearing of this character when the driving and driven shafts are mounted in the manner I have shown and described, the engagement 1 of a pin on a disk of the lower shaft when the latter is the driving element and when turned in the direction of the arrow 1', Fig. 6, is

I disk 35, but it is not necessary to bevel the ins of the disks 3'7 and 351, as the pins of ioth of these disks at their point of engagement are below the pins of the disk and therefore never engage. the ends of.the same.

The linkage shafts for transmitting the movement to the various car axles areconnected with the power shaft from the engine or by means of universal joints 5 at the r ends, water, the

which are clearly shown in Figs. 9 and 10, and by extension joints 6, a detail of which is shown in Figs. 11 and 12, and these extension joints in turn have other universal joints at their opposite ends. The extension joints are in part of ordinary construction, comprising a squared shank 101 fitting a squared recess 102 in a squared shell 103. To the opposite ends of these members the yokes 104 for the universal joints arose cured, which yokes are held in-plaee by flat keys 105 driven into recesses formed half in the yoke and half in the shank of the extension joint members. in addition to the squared portion of these members, a guiding stem 107 is carried by the internal member and siides in. and out of a circular opening in the other member, preventing jamming or gouging by the squared portion. The universal joints are substantially the same as those in common use, and their yokes 108 are held to the shafts by means of keys 109 driven into recesses in the manner shown, and as described with reference to the extension couplings. The pivot pins 110 of the yokes are seated or journaled in a block 111, and the novel feature of this invention con sists in making such blocks hollow and closing its open ends with plates 112 making fluid-tight joints. The chamber 113 thus provided is kept full of oil to afford constant lubrication for the pivot pins of the yokes connected to said block, such chamber being filled through the opening 114, closed by a crew plug 1.15.

In the structure shown and described herewith, thc pitch diameter of the pin disks are equal, in consequence of which the diameter of said pins is equal to the distance between the centers of the shafts carrying the same, and their ends are beveled as described to facilitate their engagement when driven in certain directions. When the pitch diameters of the pin disks are not or ual, however, the pins may have epicycloidal and hypocycloidal axial sections. .In pin gearing of the character forming the subject of my invention, the pins being of such massive size, means must he provided for reducing .the noise ordinarily occasioned by their engagement. The sleeves carried by the pins are arranged to rotate with respect thereto and this Wlll in a measure dissipate the objectionable noise. To remove it entirely, however, 1 provide the surface of the sleeves with a special composition that is, both non-wearing and nonrcsoua1'1t.

The sleeve prepared in accordance with this part of my invention is fully shown in the perspective view. Fig. 21. The sleeve 23 is provided with shoulders 120 at each end, forming a recess on the surface between said shoulders, and in this recess is wound :1 strip,

ends being secured by suitable strips 121 of raw-hide, saturated with gauze plate 123, and this fibrous material is carried by said several disks for mutual enmeans. The sleeve thus prepared is soaked in pitch at 212 F., which action drives :out the moisture and replaces such moisture with. pitch. The'sleeve is then coated with a composition consisting of equal parts of bitumen and l1ydraulic cement and a terv this has set, it may be turned and. trued to the desiredshape. Other means of providing a non-resona nt surface for the sleeves are possi ble, such for instance, as filling the space or recess of the same withialuminuni-babbitt metal or other non-resonant anti-friction metal. The recess within the sleeve is filled with fibrous material 122- retaincd by a wire filled with oil to lubricate the surfaces of the pin and sleeve.

I'laving thus described my invention, I claim and desire to secure by Letters Patent:--

1. In driving mechanism for self-propelled cars, the combination of a truck having the usual wheels, axles for said wheels suitably .joiirnaled therein, heavy disks keyed to said axles, a driven shaft disposed. at right angles to and supported by said axles, said driven shaft crossing said axles, heavy disks carried by said shaft, and pins gagement-Whereby the axles may be actuated by said driven shaft, said disks beingfof the same diameter and the ins of the same meshing at a point o'il'set wit 1 respect to their axial lines. i

2. in driving mecl-ianism for self-propelled cars, the combination of a truck having the usual Wheels, axles for said wheels suitably 'journaled therein, disks keyed to said axles, a shaft supported by said axles and crossing the same, said shaft being disposed at .a right angle with respect tothe axles, disks carried by said shaft, pins carried by said disks-for mutual engagement whereby the axles may be actuated by the movement of said shaft, a driving shaft, and means for transmitting the movement of said driving shaft to the shaft supported bythe axles, said disks being of the same diameter and the ins of the same engaging at a point offset with respect to the axial lines of said disks. i

3. In driving mechanism for self-propelled cars, the combination of a truck having the usual wheels, axles for said wheels suitabl journaled therein, disks carried by said axles, shafts supported by said axles and crossing the same, said shafts being disposed at right angles to the axles, disks carried by said shafts, pins carried by said several disks for mutual engagement whereby the axles may be actuated by said shafts, a driving shaft, a series of universal extension joints serving to 1, connect and transmit the movement of said driving shaft to the shafts supported by the j several axles, said disks being of the same dij ameter and having'their pins meshing at a l point offset with respect to the axial lines of said disks.

4. Indriving mechanism for self-propelled cars, the combination of a truck having the usual Wheels, axles for said Wheels suitably journaled therein, disks carried by said axles, shafts supported by said axles and'icrossing the same, said shafts being disposed at right angles to the axles, disks carried by said shafts, pins carried by said several disks for mutual engagement whereby the axles may be actuated by said shafts, a motor, a shaft driven thereby, a series of universal extension joints serving to connect the driving and driven elements and transmitting the movement of said motor driven shaft to the shafts supported by the axles, said disks be ing of the "same diameter and having pins which engage at a point offset with respect to the axial line of said disks.

5. In driving mechanism for self-propelled cars, the combination of the driving shaft, a driven shaft or axle, the driving shaft being disposed at right angles to and crossing the driven shaft, a second driven shaft or axle disposed in the same relative position, gearing carried by said shafts whereby they may be driven, bearing blocks whereby the driving shaft is supported by the driven shafts, and swiveling saddle blocks combined therewith to take up the rocking motion due to undulations caused by irregularities in the roadbed.

6. In driving mechanism for self-propelled cars, the combination of the driving shaft, a driven shaft or axle, the driving shaft being disposed at right angles to and crossing the driven shaft, a second driven shaft or axle disposed in the same relative position, gearing carried by said shafts whereby they may be driven, bearing blocks whereby the driving shaft is supported by the driven shafts, and means combined therewith to take up the rocking motion due to undulations caused by irregularities in the roadbed.

7. .ln driving mechanism for self-propelled cars, the combination of a driving shaft, a driven shaft or axle, the driving shaft being disposed at right angles to and crossing the driven shaft, a second driven shaft or axle disposed in the same relative pos1t1on,'gearmg carried by said shafts whereby they may be driven, and swiveling supports'carried by 1 the driven shafts and supporting the driving shaft.

8. in driving mechanism for self-propelled cars, the combination of a driving shaft, two sets of driven shafts or axles, the driving shaft being disposed at right angles to and crossing the driven shafts, gearing carried by said shafts whereby the parts may be driven, swiveling supports carried by the driven shafts and su iporting the driving shaft, and a motor disposed between said sets of driven shafts for actuating the (.lriving shaft.

disks of the axles, .a motor, a shaft driven- 9. In a self ropelled car, the combination of a truck, ax es carried thereby, wheels on said axles, p'in disks carried by said axles, shafts supported by said axles, pin disks carried thereby for engagement with the pin thereby, and a series of extension and nn1- versal joints for transmitting the movement of the same to the shafts supported by the axles.

10. The combination, in a self-propelled car, of a pair of motors, a shaft disposed between the same and driven in one direction only, power transmitting members carried by said shaft and adapted for transmitting the movement of such shaft in opposite directions, and means for connecting said members to the shaft.

11. The combination, in a self-propelled car, of a pair of motors, a shaft disposed between the same and driven in one direction only, power transmitting members carried by said shaft and adapted for transi'nitting the movement of such shaft in opposite diree tions, clutches carried by said members, and means for shifting said clutches.

J2. The combination, in a self-propelled car, of apair of motors, a shaft disposed between the same and driven in one direction only, power transmitting members loose on said shaft and adapted for transmitting the movement of such shaftin opposite directions, clutches carried by said. members, movable sleeve splined to the shaft for shifting said eluteies, and. means for moving said sleeve.

13. in a self-propelled car, the combination oi a truck, axles carried thm'eby, a draw ins; shaft, the latter being disposed at right angles to the axles and as close convenient to the same, disks carried by the axles, disks carried by the driving shaft, and pins carried by said disks for engagement wit each other whereby said axles may be (lll ,n from said shaft, said. disks being of the same diameter. and the diameter of said pins being equal to the distance between the centers of the axles and said driven shaft.

1.4. In a self-propelled car, the combination of a truck, axles carried thereby, a driving shaft, the latter being disposed at right angles to the axles and as close as convenient to the same. disks carried by the axles,

in testimony whereof, l have signed disks carried bv the driving shaft, and pins carried. by sai disks for engagement with each other whereby said axles may be dri vcn from the, slfaft, said disks being of the Snmc diameter and the diameter of said pins being equal to the distance between the centers of the axles and said driven shaft, said pins lmv ing beveled ends to facilitate their engap ment when driven in certain directions.

15. In a self-propelled car, the'eombii'mtion of the trucks, axles carried thereby, driving shafts disposed at right angles to said axles, disks carried by the driving shafts, disks carried by the axles, pins carried b y-said disks for engagement with en ch other whereby the axles may be driven by said shafts, said disks being of the same diameter and the diameter of said pins being equal in the distance between the centers of the shafts and said axles, said pins having beveled ends to facilitate their engagement for being driven in certain directions, and rotatable sleeves carried by-said pins.

N3. in a self-propelled car, the cembimn tion of the trucks, axles carried thereby, a driving shaft disposed at right angles to said axles, disks carried by the axles, disks carried by the driving: shaft, pins carried by said disks for engagement with each other whcrcby the axles may be driven by said. shafts, the diameter of said pins being equal to the distance between the centers of the shafts, said pins having beveled ends to facilitate their engagement for being driven in cert nin directions, rotatable sleeves carried by said pins, and a covering of non-resonant malcrial for said sleeves.

17. in a self-propelled car, the combination of a truck, axles carried thorel'ry, a drivin; shaft disposed at crossing said axles, disks on said axles and shaft, pins on said disks for engagement whereby the axles may be driven by the shaft, rein-table sleeves carried by said pins,

means for holding said pins in place, and

means for lubricating said sleeves.

my name to this specification, 1n the presence of; two subscribing witnesses.

. WM. D. lrlARliS.

hlURRAY C. Bornn, Jos. ll. KLEIN.

ion 

